you can add your custom attributes in the YAML frontmatter but:
- They MUST be in proper yaml format.
- If an attribute is not handled by obsidian or plugin, it will be ignored. But still has to be YAML format.
- There is no support (yet) for adding a linked mention to another note, that is, if NoteA has this frontmatter:
---
links: [[NoteB]], [[NoteC]]
---
It will not work. NoteA will not appear as a linked mention (backlink) in NoteB and NoteC.
- The YAML frontmatter is not scanned when searching for unlinked mentions (and probably never will be). That is, if NoteA has this frontmatter:
---
connections: [NoteB, NoteC]
---
NoteA will not appear as an unlinked mention in NoteB and NoteC.
Addendum:
I would like to add that if at some point we add support for linking other notes in the YAML block, it will be specific and limited to a YAML attribute, like related: . But it still won’t be possible to add linked mentions in other attributes.
So if this is your intent, I think you are still better off with you own frontmatter in the document and not in the YAML block.